Gearing for lathes



Feb. 28, 1928.

-A. L. H. VERWYS ET AL GEARING FOR LATHES Filed May 17. 1927 lnvenTovAdrian '.Verw Vinceni lerwgg 5- Mff Patented Feb. 28, 1928.

UNITED STATES PATENT OFFICE."

ADRIAN L. H. VERWYS AND VINCENT VERWYS, 10F GRAND RAPIDS, MICHIGAN.

GEARING FOR LATHES.

This invention relates to an improvement in woodturning lathes and ismore particu-- larly concerned in improvements in the mechanism shown inthe issued patent to James Hoogerhyde, No. 1,546,447, issued July 21,1925. I

In thepatent to Hoogerhyde the part of the machine which holds the workto be turned is moved backand forth, toward and away from the cutterswhich act upon the work. It is desirable at times that such work shallnot have any rotativemovement, this being efiected by disconnectingcertain driving gearing. It is also, by reason of the swinging mount ofthe part of the machine which carriesthework, necessary for thepractical operation of the machine to provide proper mountings of theparts to permit movements for effecting such gearing connections anddisconnections without binding or cramping, and it is primarily to theseends that the present invention. is directed, to produce a practicalandoperative construction which eliminates all cramping and bindingbetween theparts so that the necessary movements forveffectingconnection or disconnection of the gearing which controls the rotatingmovement of the work may be made.

The constructionfor the attainment of these ends,.as well as many othersnot specifically stated at this time, will be apparent from thefollowing description taken in connection with the accompanyingdrawing,. in which, v

Fig. 1 is an end elevation of the WOOd turning lathe, certain partsbeing removed and shown in section.

F'g. 2 i s an enlarged elevation of the gearing used for controlling therotation of the work,-the gearing being shown connectedin Fig, 2, whilein Fig. 1 it is shown disconnected, and 7 Fig. 3 is a fragmentaryenlarged front elevation, with parts in section to better illustrate theconstruction, the plane of sec.- tion being substantially on line 3-3 ofFig.1.-

Like reference; characters refer to like parts in the different figuresof the. drawmg.

The pedestal or'main support for the machine is indicated at 1 and atits upper end it carries a rotating series of cutters (not shown) which.are driven by a motor 2.

Bracket arms 3. are attached to the front of the main support 1extending substantially horizontal, therefrom. A rock shaft 4 isrotatably mounted between and carried by the arms 3 to which a handle 5is attached for the purpose of manually rocking the shaft. An arm (Sisconnected to the shaft 4 and one end thereof is connected by link 7 tothe tilting frame 8which supports the WOIk;

holding devices. I 7 Frame 8 1S p1votally mounted at 1ts lower end on ashaft 9 which in turn is carried in suitable bearings. extending forwardfrom At the upper end and to one side of the frame 8 a housing 10 ispermanently secured into which a shaft 11 extends on which a worm wheel12 is secured. The rotation of the wheel 12 controls therotation' of thehead stockspindle carried by frame 8,With

which the Work isconnected in the operation of the machine, 1

A horizontal partition'13 extends from the frontside of the housing 10forward a distance being'located above the bottom of the housing and atits upper side and near its end having a concave bearing surface, asbest shown in Fig. 2, while the upper end of'the housing is similarlyconcaved but in the oppositefdirection, as indicated at 14. A stirrupmember having two ends or heads 15; and 16 connected at one side'by avertical section 17 is mounted between the upper end 14 ofthe housingand the partition 13, the upper and lower-sides of the two heads 15 and16 being of convex shape so as to'fit the concave bearing surfaces at 14and on thepartition 13. i

'A'shaft 18 lies along theend. of the tilting frame 8 and at its upperend passes into the housing 10 and through openings in thepartition 13and head 16, said openings being elongated and longer than :the

diameter of the shaft. A Worm 19is secured to the upper end portion ofthe shaft 18. The upper end of the shaft is rotatably mounted in abearing 20 which is directly below the head 15-while the shaft belowsaid worm passes another bearing 20 located against the-upper sideof thepart 16.. The two bearings 20 are connected by vertical bar ZO -andthesame are held in position by plates and 16 secured to the free edgesof the heads 15 and 16 previously described. with their connectingmember E20 may have a limited sliding movement so as to connect the work19 to the work-wheel 12 or disconnect it therefrom. As will later bedescribed the worm 19 normally is in engagement with the wheel 12. i i aShaft 18 at its lower end extends through a housing 21 fixed to thelower end of the frame 8 as shown in Fig. 3. Within said housing theshaft is equnqpcd with two bevelled gearsifl spacedapart and idle ontheshaft both being in mesh with a bevelled goal-S23 fixed on the end ofa drive shaft 24: located in direct alignment with the shaft 9; Asuitable reversing clutch 25 for the purpose of Connecting either gear22 with the shaft 18 is mounted on said shaft 18 between the To theconnecting bar 20" between the bearings 20 a. rod "QClll'GCl whichextends forward through the front side of the. housing 10 and isequipped with alcnoh 26 for manual operation. .A spring 26 is locatedaround the rod as shown in Figs. 1 and i2 and its normal effect is tomove the worm 19 into engagement with the work wheel 12; However, bygrasping the knob and pulling outwardly on the same-the spring may becompressed and worm and wheel 12 freed from engagement with each other.The knob is equipped with the usual finger which, when the knob ispulled out and turned engages against the outer side of the housing soas to hold theparts disengaged. Y There is also associated with themachine the lever 27 pivotally mounted be tween its ends on one end ofthe tilting frame 8, one end of the lever extending up wardly intothehousing and engaging with the vertical connecting bar 20* whileth'e"other end is equipped with a roller to ride i on a cam 28 fixed to oneend of the main 1 support or pedestal 1. i

When the tilting frame 8 with the mechanism' mounted thereon is movedforward to the position shown in Fig. land the work is movedaway fromthe cutters, there occurs an automatic disconnection of the worm 19 fromthe worm wheel 12; and when it is tilted. in the opposite direction tobring the work in conpiiiction with the cutters, before whichconpinctioii of cutters and i work occurs the worm and worm wheel arebrought into connection by the spring 26 which is free to act when thelowerend of lever 27 passes infront ofthe cam 28. It is also evidentthat by use of the ,knob 26' such disconnection of the worm and wormwheel may be made at anytime irrespective of the position of the workwith respect to'the-cutters. This may hedesirable at timesgf I i ri I Inthis wa the two bearin s 20v In any case whenever, the worm 19 and theworm wheel 12 are connected or'disconneeted, the shaft 18 turns aboutthe axis of the shafts 9 and 2d and the bearing made by the heads 15 and16 connected between member 17 has a self aligning rotative movementabout a center midway between the two heads 15 and 16. This obviates anytendency of the parts to cramp or bind which otherwise would occur. Thisis a primary feature of importance in the present invention, naincly,the prevention of this cramping and binding action when the shaft resultbyequivalent means comprehended by the claims appended hereto defininingthe invention.

We claim; i

i 1. In a machine of the class described, a main support,-a tiltingframe mounted on then'iain support to move towardor away therefrom, adriven shaft paralleling one end of the main support and ti-ltabletherewith, a gear adapted tobe driven by said shaft, gearing on saidshaft to engage With said gear, means normally tending to hold saidgearing and gear in engagement, means for automatically separating saidgearing and gearon outward tilting movement of the tilting frame,bearings for the upper end of said shaft, a self aligning movablesupport for said bearings through the lower end of which the shaftpasses having convexed upper and lower ends andbearing members havingconcave surfaces with which said convexed surfaces engage, substantially as and for the purposes described.

2. In a machine of the class described, a main support, a tilting framemounted at thefront of said main support for movement about a horizontalaxis toward or away from the. main support, a driven shaft parallelingone end of the tilting frame and movable with saidfraine, ahousing'carried by the tilting frameinto whichtheupper end portion ofsaid shaft is received, a' second shaft extending into said housing, aworm wheel on said second shaft, aworm on the first shaft to engage withsaid worm wheel, bearings for the upper endof the i Y first shaft, amember carryingisaid bearings having curved upper and lowerends, theupper ends of said member engaging against main support, a substantiallyvertical framev mounted at its lower end on said main support to tiltabout ahorizontal axis and move toward or away from said main support, ashaft located alongside one end of said tilting frame and movable withsaid frame, a housing at theupper end of the tilting frame into whichthe shaft passes, a second shaft extending into said housing, a wormWheel on said second shaft, a worm on said first shaft adapted to engagewith said wheel,

a movable bearing at theuppe-r end of the first shaft whereby it maybemoved so as to engage the worm with or disengage it from the worm wheel,and a self aligning member mounted within the housing and movable todifferent positions about a relatively fixed center on which member saidmovable bearing is supported whereby the first shaft may be freelymovedwith respect to the second shaft and the worm wheel carried thereby V4'. .In a machine of the class described,'

a main support, a frame located in front of the main support andtiltably mounted at its lower end on saidsupport to turn about ahorizontal axis toward or away from the support, a shaft mounted alongone end of the tilting frame and movable therewith, a second shaftmounted horizontally at the upper end of the tilting frame,interengaging gearing on said shaft for driving the second shaft fromthe first shaft when said gearing is in engagement, said first shaftbeing movable about the tilting axis of the tilting frame to disengagesaid gearing, and a support for the upper end of said first shaftcarrying bearings for the shaft, said support beingv shiftable'. about arelatively fixed center and having ends formed as arcs of circles aboutsaid center, and means bearing against each end of the said supporthaving curved surfaces to conform to the curved surfaces on the ends ofsaid support.

In testimony whereof we aflix our signatures.

V ADRIAN L. H. VERWYS.

VINCENT VERWYS.

